Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Freezing Point Depression and Boiling Point Elevation03:12

Freezing Point Depression and Boiling Point Elevation

32.7K
Boiling Point Elevation
The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
32.7K
Isochoric and Isobaric Processes01:21

Isochoric and Isobaric Processes

4.2K
A thermodynamic process that occurs at constant volume is called an isochoric process. According to the first law of thermodynamics, heat supplied or removed from the system is partially utilized to perform work and change the internal energy of the system. However, in an isochoric process, the volume remains constant. Hence, the work done by the system is zero. Therefore, the exchange of heat changes the internal energy of the system only. 
Suppose 1000 g of water is heated from 40...
4.2K
Precipitation Gravimetry01:03

Precipitation Gravimetry

12.8K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
12.8K
Freezing Point Depression and Boiling Point Elevation01:24

Freezing Point Depression and Boiling Point Elevation

154
When a non-volatile solute is added to a pure solvent, it results in the lowering of the freezing point of the solvent. This phenomenon is called freezing point depression. The extent to which the freezing point is lowered depends on the molality of the solute -the number of moles of solute per kilogram of solvent and the cryoscopic constant of the solvent.From the plot of chemical potential, μ, against temperature, it is evident that the μ of both solid and liquid solvents decrease...
154

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Theoretical and Centrifuge Modeling Experimental Monitoring Study on the Seismic Behavior of an Inclined Crack in a Slope.

Sensors (Basel, Switzerland)·2026
Same author

Living Inorganic Nanomaterials: Design, Preparation, and Biomedical Applications.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

A novel berberine derivative B12 exhibits superior anti-obesity effects via targeting brown and white adipocyte dynamics.

International journal of obesity (2005)·2026
Same author

Injectable Thermal-Protective Hydrogel Enables Curative Tumor Ablation via Chemo-Immunomodulation.

ACS applied materials & interfaces·2026
Same author

Lactate-Driven Restriction of Mitochondrial Permeability Transition Promotes Resistance to Chemo-Immunotherapy by Suppressing Tumor PANoptosis.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Coded Caching Scheme for Multiaccess Cache-Assisted Partially Connected Linear Network via Multi-Antenna Placement Delivery Array.

Entropy (Basel, Switzerland)·2026

相关实验视频

Updated: May 3, 2026

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
10:28

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

5.8K

集成功能增强和主动学习策略的GBDT方法 - - 波福特海海冰厚度逆转.

Yanling Han1, Junjie Huang1, Zhenling Ma1

  • 1Shanghai Marine Intelligent Information and Navigation Remote Sensing Engineering Technology Research Center, Key Laboratory of Fisheries Information, Ministry of Agriculture, College of Information, Shanghai Ocean University, Shanghai 201306, China.

Sensors (Basel, Switzerland)
|May 11, 2024
PubMed
概括

本研究引入了改进的渐变增强决策树 (GBDT) 模型,使用遥感数据准确逆转海冰厚度. 改进后的模型显著提高了准确性,解决了海冰监测中样本不足和数据噪声的局限性.

关键词:
在GBDTGBDTGBDTGBDTGBDTGBDTGBD积极学习是积极学习.功能增强 功能增强 功能增强规范化处理过程中的正常化.查询策略 查询策略海冰的厚度 海冰的厚度哨兵-1 哨兵-1 哨兵-1 哨兵

更多相关视频

Simulating Impacts of Ice Storms on Forest Ecosystems
06:27

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 2020

7.0K
Author Spotlight: Innovative Ice Cream Melting Behavior Analysis Through a Computer Vision System
08:02

Author Spotlight: Innovative Ice Cream Melting Behavior Analysis Through a Computer Vision System

Published on: October 4, 2024

2.3K

相关实验视频

Last Updated: May 3, 2026

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
10:28

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

5.8K
Simulating Impacts of Ice Storms on Forest Ecosystems
06:27

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 2020

7.0K
Author Spotlight: Innovative Ice Cream Melting Behavior Analysis Through a Computer Vision System
08:02

Author Spotlight: Innovative Ice Cream Melting Behavior Analysis Through a Computer Vision System

Published on: October 4, 2024

2.3K

科学领域:

  • 地球科学 地球科学 地球科学
  • 遥感 遥感 遥感 遥感
  • 气候科学 气候科学

背景情况:

  • 海冰厚度对全球气候和人类活动至关重要.
  • 目前用于海冰厚度逆转的遥感方法遭受样本不足和噪音干扰.
  • 高空间分辨率数据往往含有有限的信息,影响反转精度.

研究的目的:

  • 开发一种改进的渐变增强决策树 (GBDT) 方法,用于准确的海冰厚度逆转.
  • 为了解决远程传感数据中样本不足和数据噪声的局限性.
  • 为了提高海冰厚度反转模型的准确性和概括能力.

主要方法:

  • 设计了一种改进的GBDT方法,集成功能增强和主动学习 (IFEAL-GBDT).
  • 使用事件角度和时间序列数据应用时空校正.
  • 生成了多属性特征,包括月份和海水温度,并采用了最大标准偏差的积极学习.

主要成果:

  • 该IFEAL-GBDT方法实现了海冰厚度的高反转精度.
  • 证明了平均绝对误差为8厘米,根平均平方误差为13.7厘米.
  • 获得0.912的相关系数,优于其他方法.

结论:

  • 拟议的IFEAL-GBDT方法有效地提高了海冰厚度逆转的准确性.
  • 该方法适用于使用Sentinel-1数据的高精度海冰厚度逆转.
  • 功能增强和积极学习策略显著提高模型性能.